{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "5218",
    "entityType": "User",
    "nonce": "0x8a51d014c66fb8ffaffc8524f5142b832b48d01576b22520448aa317c63439ad",
    "signature": "0x33424f2d44c05b307403a112d863973219382dfa29f35abbfc4d70ad601aaa957e6126d5051356976a056c3bd7443c0fd1a1fb69a29315e1c5c178cc741c80031c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}