{
  "manageEntity": {
    "action": "Save",
    "entityId": "823234399",
    "entityType": "Track",
    "nonce": "0x07bab6a614707d3ef36233308cf3ceb9f4dddde325f5ed6d96f246e6fd0368da",
    "signature": "0x8e59e4a704f3cf60ccbbb0a1c9d3b779660a3c7c05fd8e4a9ee5ffef112def6a15cc276926e31f40c9a2cff90020130b46f324dd318798317c8ad56b925a9dfd1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}