{
  "manageEntity": {
    "action": "Save",
    "entityId": "1297189294",
    "entityType": "Track",
    "nonce": "0x73cecdb1d089644657d60dd0fb261c3a5988780338a0f22c89a6f763845f5757",
    "signature": "0xfad127e3507bb316d6f69ef4dd0a00cef3fd99591d85cced3e95d6b51c006afe30b934cfca972678cb4552574206b475d39e59e4d64ff8444ee2f58b04c838bd1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}