{
  "manageEntity": {
    "action": "Save",
    "entityId": "1331462949",
    "entityType": "Track",
    "nonce": "0x1c505400bb57bdceddd1ca4953b35dc9c47c86a201e2ee8a0bc1e3613befdbd1",
    "signature": "0x8fb51ca8a2dac76cbd446dede8b78dc4b15f2479c7f5a03d86fd79634637f4680946f10b7cff8d641618546e6d97670f4d39dd659046b8598872fe2928ce8b201b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}