{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "198400104",
    "entityType": "User",
    "nonce": "0x18cd54d75182361d72151b63d417c377ce6b261a3f74397813dc43d9a516757f",
    "signature": "0x2eb9512f6c1a0360f9beab51406e5d9fef55a22bf864998a272dd02b1cf2c6a10178d47efa556629e9cd4b21498e6399bac47fa936b8087852724f8cc6de3fc71c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}