{
  "manageEntity": {
    "action": "Save",
    "entityId": "477774765",
    "entityType": "Track",
    "nonce": "0xd22636bd7cddb5b5ac5ceae1ba17a4a3791692a36037d3c537c09a8aeebf4d15",
    "signature": "0x1b56bf5a04a472a671c02bb3dad1186b430c593dba7afa7b1eaf59366938fe9e073b7e8faa8835bc0f13a41629554f1825114a1ef2788014018da776a9c450a01c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}