{
  "manageEntity": {
    "action": "Save",
    "entityId": "1242931331",
    "entityType": "Track",
    "nonce": "0xd6a4e12dbfb564713a27db6a3a22fee8530417d282826d17c1a913133a479bb5",
    "signature": "0x55398178617699d91d55e55cc41e388c4c2699919296992f0c05319c46e1841743cd07bef2be4c72495044576e1f6b1aa1e2dea75e1ebe949c22bfd4d4b5360d1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}