{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa42da545ffa511769590ab892e7ab8ad7cc8fd444f98ab7ad0b587bb65ba5248",
    "signature": "0x221f407f0525f9312084393bf1853ff710fba86b777ada4f177978ff091673547a09ce87f0a24fdb9687b57954335c82aa0b8930471e6c839f57a112a2b2bbdd1c",
    "signer": "0xD840f32624AEbA5D5A8eE3Ae1A58a4b6b4596F85",
    "userId": "728762304"
  }
}