{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2554",
    "entityType": "User",
    "nonce": "0xabf2f9bb5dd3de2ee912705e525319d6854595ce83c626373c470de9801199a9",
    "signature": "0x6802c864d3d4d26f53f74d5f296a90ef72020b84ea05d4161bf2f339fadb8b1a2b7c05cec7087858936f508eaa98b84980d0543bdeb91975642bf946ea7dc45d1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}