{
  "manageEntity": {
    "action": "Save",
    "entityId": "978367737",
    "entityType": "Track",
    "nonce": "0x3b04c68dd2386cbcd0dadeb6d086d6e8050f29d910b75528c512c131a5f0721d",
    "signature": "0x269eef1213a4df4463377d6f791e28b86172cd7d3c763edd062722f85d94ab692d4f2b8f7bf2a605a39420c3d653cadfc90a7bab107e51c7c5a905bdaf36ecf61c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}