{
  "manageEntity": {
    "action": "Save",
    "entityId": "988516",
    "entityType": "Track",
    "nonce": "0x733a482506e7e6b6621f25edc954cc57f2956bedf2968bc5900034ea31609b28",
    "signature": "0x6c88c79756dba1ff567f5a708a5596faf6fac4aff16888aa5b55c8e51ebcbb3a6f0c6c42569d7c25f755468750a8ed1498fe8b6d0e492be62dc8a6a43157fe4f1b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}