{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xde5d16cc1fa0b08f19eb7cf6b34b28f62c50bf79dad2485695649b10956557c4",
    "signature": "0xb8f54c3b68fec0a6a60fc5dd824e5e36a3216800582ac7db33a5eb2a2b87b49d1c3ef2bd16f890388ee86ef57364941ea9f71d0fbb9b5018fbb1dbeb703da7fd1b",
    "signer": "0x2F9864d7d33e6411cF49b5E7d1D73C2A5e0A289F",
    "userId": "549774400"
  }
}