{
  "manageEntity": {
    "action": "Save",
    "entityId": "288395",
    "entityType": "Track",
    "nonce": "0x6394445861acdf563c51e6b3b781b5e53abc3ee2435b3e0ea3dce8dd902a94ae",
    "signature": "0x3a5ee5c070df4c5417cc7469e889673eb87b0e857dec0760290d4ca337cccb4066765f0e03ae9d31e4197ed36a0fcfb4e62c028f6a9716cee589db478567d68a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}