{
  "manageEntity": {
    "action": "Save",
    "entityId": "1946278774",
    "entityType": "Track",
    "nonce": "0x46e68065f7ee7302c31fddb86361a90a97a0e7175e3ce97038b70b89ea33e6d7",
    "signature": "0x7ce7e4a47bdbb40fd97779e5cd6d8e79def9bf1a067600e38e5e97a9a00d26061308518ef1676aa8062fadfbf52003f072051e26107d4864ece6aeaf9ed1cbdd1c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}