{
  "manageEntity": {
    "action": "Save",
    "entityId": "813879",
    "entityType": "Track",
    "nonce": "0xf3ad4bc8189d94ef486b2ab4724906717cf50d88fdf0bd4dd0146daac0b31dfa",
    "signature": "0x9ca5c374c331c656db5cafa23b37278d8c11fbf81e650aa5529a6b0d51f2bbed031ca801d7aae60e0d32e41b1cabc7ea56d44e8e70d95b940cff66f5d6dbd8d71b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}