{
  "manageEntity": {
    "action": "Save",
    "entityId": "656733",
    "entityType": "Track",
    "nonce": "0xb18bc7bd77ec68399b1fdc05f80b0199f7ba4b7221d8b12ec496ab4b0ec3e816",
    "signature": "0x8ff9a7bab35eb3c57fee99aebff750e5f266af5b53beeceb165a4985be0bb01d10ee1022f1ef0b837aad8d2d5f0b14c23c8bac9e35c4fcf21999868cd53ff6251c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}