{
  "manageEntity": {
    "action": "Save",
    "entityId": "2081258771",
    "entityType": "Track",
    "nonce": "0xf49e3c21b55f8e794694b0bc85cbee5fd83d77db9ab5b78e9c3284a3b1be50ce",
    "signature": "0xb52a1347ff3ccc1a5fac2dc35bf915f6b2096f7ede8105b002769236fe2649cf7931520584f1cb20a2c70d7cb44eb8a10b808d29e26aef86a35a4b6afcf4d8a61b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}