{
  "manageEntity": {
    "action": "Save",
    "entityId": "1214235277",
    "entityType": "Track",
    "nonce": "0xe7bbf420fe39580505ec5099ffaf7318a9518a13fa9b04a070d70bb30a944cd4",
    "signature": "0xdf226224cdd445f22d46674f9ae88dc7928f8b5422f973a1a7e52419691a60b10ad36144b17a390e430f9af9c78a81af6dea2bfb2ad03e5436b52cc9e4e735241b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}