{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "667809204",
    "entityType": "User",
    "nonce": "0xf6c363ac1669703ec58c9e6538845f83453268b32b5af065f7870ca60ed0b2bd",
    "signature": "0x3205c2386a993769f9d2761ee8f30aed9193efc771ac5f06f35260c0800befc974609dcc5b714ad084d35a392bb87e56dd894667cc3c64aa2982e44af551ccf51b",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}