{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1c2bd60b49082117b0860ea00d5983ccdd0feed263849f5622a5fd1187cd2388",
    "signature": "0x484652991057e4c927ac9567d5578a2daa452ccb3d6fc07438f4c75ddfbd845774b327cbd49e5ee57163a7e98e5d8b83b6143baa07b1aa53082cefc6e4bd037d1c",
    "signer": "0xf7452B833E3f2AbEFf85ADF20dBa192F149C2Cde",
    "userId": "901234944"
  }
}