{
  "manageEntity": {
    "action": "Update",
    "entityId": "492531535",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierav4t352sikbusrdeuucif3nkebdou74nd7agiojqcmagdbadxmcha\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":767085494},{\"type\":\"playlist\",\"playlist_id\":1453952596},{\"type\":\"playlist\",\"playlist_id\":830210335},{\"type\":\"playlist\",\"playlist_id\":203791446}]}}}",
    "nonce": "0xa23318d0d04e25b53a7d5afc0940fca922453872c3457ad0e605c3dee141d416",
    "signature": "0x61507aee348be631be00581bf982ec5a1e1f6ac9a6be124ac3d711ff941afbec5cc5e1ea3815377ceb288e8859086cae2ec487fa02c019abff403047aff435651b",
    "signer": "0x54B193bF6F1e27B02Cd72343a3e68cd19c0110a5",
    "userId": "492531535"
  }
}