{
  "manageEntity": {
    "action": "Save",
    "entityId": "1252434871",
    "entityType": "Track",
    "nonce": "1794244723409099108",
    "signature": "0x4e756788f63f57edbb3d1504c44e0f744df651053946ce6b454d5aa483bef66a4f30bde2caad90bd4f0ee59eb179c58c0e00e5d08bad8a2999c9b73895b0040b1b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}