{
  "manageEntity": {
    "action": "Save",
    "entityId": "699303",
    "entityType": "Track",
    "nonce": "0x8d16312892457624af389a579c519846af0a391ac00847c806927bc278bd3f9e",
    "signature": "0x462705380f1b5cc2934151cbe291231986f592118ffdcfd77f1c2e9c0df3728c43fe104ad4274b9524c82a77e740495f8fda7f3bee195629315ab60fa07a2ec51b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}