{
  "manageEntity": {
    "action": "Save",
    "entityId": "1357848476",
    "entityType": "Track",
    "nonce": "0xdea0e6800cdfc17958327f3cbe3f72e846ba3fb3e066391461ffc0552a113c51",
    "signature": "0x92b0b6947e213095fa8394da618d59a3fb77922dc29bfc4eb1c48a6c197cb514619edef3c863a3040a05e9cacd43df617711627d26276d312e514e72db861e451b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}