{
  "manageEntity": {
    "action": "Save",
    "entityId": "736119338",
    "entityType": "Track",
    "nonce": "0x01fb5534db2d45f2fe6581b6be246e5e02348fed8f286cdbd26116206d9602d5",
    "signature": "0x846664bc1a8601324a9656c4834a5527b25b5d2bd2803c93ca1eb8f10dd860356f29251dd7e81202e6d41e62f8e30ed608fc73314378c07920d4f66ff64cd8ff1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}