{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "550557206",
    "entityType": "User",
    "nonce": "0x7652861f986820686f6b18f8c2a9028f465f2e5ecd8b29c88f56f73a2906a628",
    "signature": "0x687ca421562a2e2129b7eefda67bf63526ebb9d115e6eb417d2d6f28487fddc974e317fe168a5aa69f59afbfa7e7d2174f5237083af9d8681b165942325ca2ba1c",
    "signer": "0xEf3d3c6df875c67aa35e9F473e01a47D659c95f9",
    "userId": "814929010"
  }
}