{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x9a1ec6c8fa21218d3018092c4f18911f63eb2352edc1b338d44ba3a7d1811aa3",
    "signature": "0x3cc36eff11683dfab70c67a51389c4c41cf74aad900dc1bc87b500074a9bfade233b6b716a8627a0063fce425599d1889521417ecf757e8b1975944e0520978d1c",
    "signer": "0xdfcc4d06D5B8A0AF1AF77B1Ec434e5F50B625a75",
    "userId": "620921422"
  }
}