{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "619950545",
    "entityType": "User",
    "nonce": "0x72e9b867abd630502bec2935df0b0ce71fa4f0a7c22220d52c1b75311a93d4e5",
    "signature": "0xbb173c4dd8be770b50ee72f3603efd808f005f12e45af663b93eaa5630034bb763b02f6833108b23642b04f32819b3d7ffcf364465a404acf3f037dc8b5f66e11b",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}