{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x77be752a6fdb53956c259a16bcb25394c6ac2dd8a123feec3d643f9b8305fbcd",
    "signature": "0xd42795a59d5e633dd3f1007cc22db1ede2207c6dec413d443d9696cae75b06f554f6972d58c17776fa03ad51e21f96bdf2b3d697c58bd004a2e14a355afc5ee41c",
    "signer": "0x2230770EC85946F97685aDECD4b734f51662F050",
    "userId": "887741865"
  }
}