{
  "manageEntity": {
    "action": "Save",
    "entityId": "1161905563",
    "entityType": "Track",
    "nonce": "0x84818576856d319856a0a82f93a95119ff4481769cf389c35687fe565e294da2",
    "signature": "0x41fbd4116b8a6f3698abcb16c067fb41c5f66042e26b73371962a8fd01d18d0479dbf00aa28dfe87cfb05c6d1c833c0e515fcbb4df9a7caf463a586a73eba9e21b",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}