{
  "manageEntity": {
    "action": "Save",
    "entityId": "1044474049",
    "entityType": "Track",
    "nonce": "0x12375f4c88ad8a040b8cee7616cf10fd78f8525f7eb6f428d22eb791a28b0784",
    "signature": "0x3345b6971a58148467da1c8b3b1b164dfc7a27b1e899be734516e23078b6eae1422a194f465d425ef526f467d76e892c1e42e9f6b408c3f0a68b391e0eb236861c",
    "signer": "0x38c65d779554649264FD5A23B412Dd6237e675c2",
    "userId": "839739705"
  }
}