{
  "manageEntity": {
    "action": "Save",
    "entityId": "1123243",
    "entityType": "Track",
    "nonce": "0xc8bc9e35bc5486a0f3a93fe6e7a6b9c9d17e5d78cd05f9d6471de6a46a3111ae",
    "signature": "0x6911bdd7692c84d125c3d23e00c254648ace5f1cbaeca54e15d91e450e33222f63b407d86efb5a1c0e2eb08122e279967f47448cf9cbea1be367b65d6dc078411b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}