{
  "manageEntity": {
    "action": "Save",
    "entityId": "715960408",
    "entityType": "Track",
    "nonce": "1794240286506722203",
    "signature": "0x0c35783a2a3e940f86b70bc22416e13231cfa517b5b9f6014f3919a8db2642ba0635ca66c33ada7a1a78193b71413f4d139aab00d231c87a0dac192951a08cb51b",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}