{
  "manageEntity": {
    "action": "Save",
    "entityId": "1831660257",
    "entityType": "Track",
    "nonce": "0x83976aec77a0d4ba9638c8b9cc34eadfac924751ad01af585e40bbe48de44cb9",
    "signature": "0x2bbe1e8958c9d785d1d6f4dc1d8b8c02c901c74114d32702ba83d98cbeb9880624719227e06c67260c2fdd6826107536c684d181d5fafab299c324d49a704ac41c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}