{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12",
    "entityType": "User",
    "nonce": "0x8d886403ddc0ef0865f65ad9f143ac53435cce8178d22a888b7711092180651c",
    "signature": "0xd579d413efa72aa2e1b97e2cd54a115cc4dc591406bd981d7e28fc54cce7455a146df734407ebb98cb0581ab91283194255ff2d20e4ba4bc4fcda9f9945951b01c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}