{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5bb7fbc5219eea81b6f18fc966590fdbd90ea7192a2bfc2d600bd447cf8fac6e",
    "signature": "0x3988a4ccb238fa69044993b0907ef87409fa2fc1be543a5bca0ea9894e5d4f1a4e9f9a503488f284881615fcbd226efe96974f6fd907d8e09172992da1d53e241c",
    "signer": "0x357BBB1EaCE3c3e529b2dd33C2E5d7E5BE53Ba95",
    "userId": "420153723"
  }
}