{
  "manageEntity": {
    "action": "Save",
    "entityId": "344435586",
    "entityType": "Track",
    "nonce": "0xf7ab14f0d7342807c7460dd9497cd9afbd95935c7562e7eeef64416b90854052",
    "signature": "0x0e36fa95351254f23551922696cd3c851e0506bed54dd69b6e7a6d26892742a438cc02e242b054bcd538fc3da29364592683e76b68b14098d6fe8ecd62717af21b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}