{
  "manageEntity": {
    "action": "Save",
    "entityId": "1985972616",
    "entityType": "Track",
    "nonce": "0x428eb39247433fb96e936638547143ca3f66069f86f6bc29f9ef721bf3a166f3",
    "signature": "0x12e56017ec7c92a22352a5de115c6b117eb4ed376c1c78a4cfc914ca785a26e0127ac304cdb80c9b6479d494daa906ae7934820708b90f480866daee097224141c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}