{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54545",
    "entityType": "User",
    "nonce": "0x78d211596ec164373b4a7166a9b9e138e5fdbd12de2d06eec837896f0e3e7a5b",
    "signature": "0x7c4ec604a481f54dee99ef3f8b19b3b57b31a64b829caa6f68bd4dffdebf57941df639b23bc7f9e83c41c7390168a30e3620d17cdc4525cbc47dd91d35dec5f01b",
    "signer": "0x38F50a3556340c9E1365557DD31F3549c0315FB7",
    "userId": "912674314"
  }
}