{
  "manageEntity": {
    "action": "Save",
    "entityId": "2056201560",
    "entityType": "Track",
    "nonce": "0xd354b930d618ad54a6deda51e5b2f71247ea8f994aa95222aaac0c28bffc6320",
    "signature": "0x448657dc3c5184a8cc44b0122b460e535a935c16d0ae5cfcce206048af0b6ce443d7b86e5c0298ffb6d64347105f4a1be73acbca006d42bb33451f47e6251c3d1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}