{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4220",
    "entityType": "User",
    "nonce": "0x6d75d807e043f200cc0feffcdfc96a89093451dd03f9bd363fff0fd468d9e60a",
    "signature": "0x5cfab0fcc5c7b785a9a2b905d2f37d6dba0cbfe79459f68542a3c6ece03ecdb85e6641b357bbd49061a08e3e32422b2af3590ac5e796977e6f675c257591661e1b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}