{
  "manageEntity": {
    "action": "Save",
    "entityId": "1635413147",
    "entityType": "Track",
    "nonce": "0xf44b8cab842de527707c5c88254f14aa000319b3f2c686c5e7f1fd9127c43c5d",
    "signature": "0xda71436ec2e08cb92012c942bad34714b382f3a5c77b8d231770322074a575b75121be2610c4a76cceea5743cf09f1e826e748b7c313d736b208f353f7c01b861b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}