{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x231bbec37d96a3cd31b2bbf7c83a904d7dea21193b7f02522a724a66685009b2",
    "signature": "0xdd22a507770818f6326b08cfc4af32877ed7df38654f9efdba0608fd95115959197b883cdbdd78702253d618c9a95b169b1ab2de5bde39ec59804f2e89013e4d1c",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}