{
  "manageEntity": {
    "action": "Save",
    "entityId": "1372630562",
    "entityType": "Track",
    "nonce": "0x1ac3c71474771a77592e90059901a8ddc52e4578b69ef28ca56d2c6606640459",
    "signature": "0x1d18c0067eeaf09c0ba35b4664b76303b5e8469433d4d51f112b3c6912e514340dcd6ca45660a95cedbfae16b0cb8b65bf05789d7a6f079626c125d2babd447f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}