{
  "manageEntity": {
    "action": "Save",
    "entityId": "609919",
    "entityType": "Track",
    "nonce": "0x2705840c6c3a2989fb8aba4ec6492f145f0b76153fffd9f40515c5794c164b43",
    "signature": "0xe5b8a07ecc9931bcb0a0062565837d1120b2c1dea0ad46b5bd2e171b49fa99963aa3133ea45ce8684f63181bed4f0b450efbafb0c1c1f716c8d73c78121b31001c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}