{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "515077211",
    "entityType": "User",
    "nonce": "0x154956363422d1e3a364eec658a12168da345a312677fd735adc8bc3caec117c",
    "signature": "0x656fc965de3de0adbc35101abf8caf8d7d977fba915cec6a01b0cff624a7e6ab20ca5261778105264f7c1c1a87b124973e69c208e3dd862e9ea72dc76cf68f931b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}