{
  "manageEntity": {
    "action": "Save",
    "entityId": "1122416",
    "entityType": "Track",
    "nonce": "0x90a71502741b2e74e2404acb33b34b1021283944fd492c1acd3191c948ee5184",
    "signature": "0xd180df9bbd604a06394656132660a7f3c05f58b95cbab3b4d2a2e142399cd8874c2a3699a94d68d6fdb05f30ac77eabb5ff6e63de058e49fb4fa1944fec624221c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}