{
  "manageEntity": {
    "action": "Save",
    "entityId": "433902",
    "entityType": "Track",
    "nonce": "0xc6ed0775537821c74239b8779c1ab038b8f8b65ba4f00715915607d517bac9ce",
    "signature": "0x35b9ea3bae8a0f2af6f508d4179019f51548bf3de938b99fd087cf1beedf5e3777c922af4cd59c71533dcf5e7e56d8b817c7bbd126d0ea314d332430004718f51b",
    "signer": "0x8fb06be829c5718Bb968af1525d910B795617ac0",
    "userId": "950478625"
  }
}