{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "103753975",
    "entityType": "User",
    "nonce": "0xe4ccddc00e0c1f9da785415ff23393f2948aad82b37fa642dc61886127ea979b",
    "signature": "0xad560739e08f12a6c76f80cfe4704bed0be3de46778b3949b854f3637f5e09a97a777163fb350dcb8f98c430b8ba4d450def582804083f8d973fa199faa3756c1c",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}