{
  "manageEntity": {
    "action": "Save",
    "entityId": "498796",
    "entityType": "Track",
    "nonce": "0x8aff4a08fa126d437c06532a479e4c039a90291d393246bd2a37d42a22483686",
    "signature": "0x76a49f34a02311f42f00552a201e24594d1a6a85d66ee1e892d51111eaf9d09e40295694c10fba6d219b493866f7941066e24f72b5900f4c9c78a7e9cb011ace1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}