{
  "manageEntity": {
    "action": "Save",
    "entityId": "693358482",
    "entityType": "Track",
    "nonce": "0x6c9284238826bb9207bfe0d72577bacd2855b5ec07626f300404906aaf6c3df8",
    "signature": "0x73f0506be9db366291acc13a097ed48aeae80e2a438d9f598a9a9d269f1ca7217a4fc4184de2050b71bdea7f82f217c7cc859a7787fcea4bcfa65ab8aca6fb8b1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}