{
  "manageEntity": {
    "action": "Save",
    "entityId": "1281587172",
    "entityType": "Track",
    "nonce": "0x203d5bdb1edca1a98e705792a1318c35359efe1732267bcf4de7f4be8aef528c",
    "signature": "0x331d525ab047365fc17f5120569b13dadbf337214d8b925f2575b21874cb68912db9ca62f0210f03a5490d632e66b6b7910f1c73bea4876661b98d6ae22a30a71b",
    "signer": "0x4A3D09CdfD42dE4C57dc67B09a40B5d9172bD69f",
    "userId": "787102835"
  }
}