{
  "manageEntity": {
    "action": "Save",
    "entityId": "1595837225",
    "entityType": "Track",
    "nonce": "0x4cab8d0f886d8d1ca6dd6141c0749f7fcd489d7be6413870caa5382d207e6b00",
    "signature": "0xd2c9dc6e1651c5403454d96e0739ba58115b1d561c811ebb3af8be90663d262e3866bd827bd09f3be4503ff4d07147c20b94cde0d84c54211c48ea1f2537bc101b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}