{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "347139808",
    "entityType": "User",
    "nonce": "0xa50c9ed2c338ec6dca5eb15acd146d91d5402eb438d8e98592b9f3d962a4a8f8",
    "signature": "0x424d57864885f9c3627e8f8757613ee0f1024c9c60b086a503beccc3654179b0080114bdac2ce66d808ef64b10dac7eb574b6247d7c2156ac5d873b8211cb95e1b",
    "signer": "0xb9b4E7f0b734da5B1D0370F77EfB0C66c0de0dcA",
    "userId": "970570438"
  }
}