{
  "manageEntity": {
    "action": "Save",
    "entityId": "186950",
    "entityType": "Track",
    "nonce": "0x95472f941f48c02f80165a40c4cc2c77af0c130e6a94fd5b4166ff23efacc734",
    "signature": "0x1c214d1a69014677fe04e59f82d302f1750b6ec3975ce40dd9f2806481defb1c33f13fb3c39fca44467e771ebe4a22d38447dbf6495a510f63ddfa1e9377a9961b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}