{
  "manageEntity": {
    "action": "Save",
    "entityId": "1998774012",
    "entityType": "Track",
    "nonce": "0x75de33fed687c6624062c8baaecc08211f4bf5886fea9255b9d1b88428891320",
    "signature": "0x56dd4d7c43d1e0d28a49d03dc682dd5cc83216819a3a9d98a317ad206106bad55a289ecf38b79ff66be9f03ddda0df12cd7576a06bfc6e31d62fa01e9b517c4c1b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}