{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5d54c966f45aad850ed88d4baf24857094cc62ad289c8770e5a4dad3a43a3dd8",
    "signature": "0x8b647eff6eba26c8d7314fa91e5c1046745d9c944709878a5b168fa1c6e7f03c12f056585b73fe2f28103143b341373dbf30742125f43f0d73b3894197032f601b",
    "signer": "0xf52B71e1c028280A28328A3613CD2341365CC8A3",
    "userId": "357679746"
  }
}