{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "816709547",
    "entityType": "User",
    "nonce": "0x3f8763f6b7a3a2ac9083b63c6ba2a407f02e97009701978e86e3cf9175cd7eb9",
    "signature": "0x798843d27fd9bd4a74288216442376f0d2c4ed5f2609ef21b9b4ea797ab974af0c04c4e031e4e3727930671d5974edcee3f163c51a0318531983e134138e5e131b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}