{
  "manageEntity": {
    "action": "Save",
    "entityId": "356880039",
    "entityType": "Track",
    "nonce": "0xd81465ba5a7b63c23410692c76255d5301c4d5c3cae7720fd016108f05ff20a1",
    "signature": "0x86f885d19cecb05554c3b4041d4d080c534eca57bb36ec0f70cda7b127630af028bb7ab8868c1b5de29b2e4d955d199b96436d8b63313d7f712bd1f5f7d19c841c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}