{
  "manageEntity": {
    "action": "Save",
    "entityId": "1039940",
    "entityType": "Track",
    "nonce": "0x3cf12cb1c3d4666ee7568dfbec7133f257c7699e73d67cb3aa59886fd89963df",
    "signature": "0xa2790188d15b62713a9fe10a4a9edc9068eecfce61aff79214f94bff1e44299625738b58856ea669371dcc62b4e874d7586e77c1e66af69eed9b8aae8447c0151b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}