{
  "manageEntity": {
    "action": "Save",
    "entityId": "1262759610",
    "entityType": "Track",
    "nonce": "0x9dc49a00053306de2930ee0f10a7d501898415f08a1bab947b7d5bd031984fdc",
    "signature": "0x7020b478d28245ae7b8afa8b31a8bb19609eeb14e278c5cd985bd1448b349f356903f1b93787027cfb0e37dbaa75c65d58178ccbd5a97026568c54ee04b2acb31c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}