{
  "manageEntity": {
    "action": "Save",
    "entityId": "604653737",
    "entityType": "Track",
    "nonce": "0x93dd7a9462dfd575d77f2be89ac9c537f16eab50d750c629b347d86cb15dc6ba",
    "signature": "0xe68e8eb19f17ebc94299929a21d8a306098096d4aa17ae2d6474e8692dd1164e788c747335a98fec67863a9a34bd4cef084bf687d99bcff3f822b42b6cc85ffe1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}