{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7b619ef5affeef868613adeb7ec65c0d5c27ccb2a77c0feaa4e68e7245ade193",
    "signature": "0x6d0fb74b34149be5c98430584d916d9673835a44cf81d63d5fb209d1a1d387f87709a1feff64ae7822e74c75bbd3bfcd5a5e87ad06f99e0b53f25f0b35250c6d1b",
    "signer": "0x8731B5D5885d6EaCb8896D9cb723D1Dc2d993e20",
    "userId": "755030485"
  }
}