{
  "manageEntity": {
    "action": "Save",
    "entityId": "1850950113",
    "entityType": "Track",
    "nonce": "0x5d4bd5a29a66be77e4ee283e703b462ed5e5f5f55392b22c12b2b304785cfbe0",
    "signature": "0xaa890dc512f6f7972fe7d19f5c3d41dee4ea3b617f3e16b1d9137135cf6fd49d43c7b7c12397803ffda90fbdf6dca74899b4ee23910e1b88524125091be23c2f1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}