{
  "manageEntity": {
    "action": "Save",
    "entityId": "9725335",
    "entityType": "Track",
    "nonce": "0x685cb2631ef62ab36cf1c0d4c74227e99e52390ca071838d89ec74325199b332",
    "signature": "0x67064342e570044aa7d168eb8e85ac4b0701f7d7af652e04d949412b138d8e14503d1db0df69791e8583c59bf0bd93610c6a5548f82dc095773bd5138c002f911b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}