{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xef254dbd245cb95629c1a4506dbd8c83dceb3ec42aea2da13aa042fb24a5ef2a",
    "signature": "0x656eabf928604691ad59bccf0b7dd021e2a8f095b6e7faf9fc024c5b096f8fd77273b10676f96eb4901f61f83fc77f63d06c63bd2ff860779b2d6df4770dce071b",
    "signer": "0x4290D2F0496995616D979DD2F9f5dAAd15e8A198",
    "userId": "629355871"
  }
}