{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x863287babaccf2b1124e338504f78de162549a69b1090a355da5326e01d81421",
    "signature": "0x3eb6fdb3eeed9391ba0aa9b494c4fa7c984c2ea4dc72520b7a53ebb158a0d78f2bb0f3eadd2032c599e43f3464257531f6abaaf5073aac7ba7cb495503b6765e1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}