{
  "manageEntity": {
    "action": "Save",
    "entityId": "444307264",
    "entityType": "Track",
    "nonce": "0x433ee6bbb594f97ef25db468a506f9a6eb2af897f256ce843d54ab62ae24855b",
    "signature": "0xa722d839e45a7f7628e3a176e9fbc94e1b87d4bf127fca189fedc6071addcf3a447392952dd02dde79c872503ddb83befc4334b1b708ffa4f22516e870fec9201b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}