{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "251854",
    "entityType": "User",
    "nonce": "0x54daa4e50cdaaf4218cba76fcedae716ef5e68bd1683db1c92cf9252cdc6da1e",
    "signature": "0x68367c1062416f7cf30312c1adc8d8e8743ff4658036c148b6283bc821c00a9f3b0a445e78ec7aa203567aca9f1a71a72a0710d6763e7de94ff6f12fa4aef5141c",
    "signer": "0x48ECe992edB7C739B36f37DDbE8Fe352996B5A56",
    "userId": "183063753"
  }
}