{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc858b83495ddca5ab503a142ff8da7153b9982bc75f512ae614dff16ad7c9dd4",
    "signature": "0x64ad75af898b2687762d5d900eb10528a1631e9ebdf77a4093413091a1b44dbd5e46f9a6f3aefd28e1052420a02b20efa39eb5bd803c6fafe35c0d682cc5f6bf1c",
    "signer": "0x164256fD3FeF02d3668FFDf40A2E946c11B9492e",
    "userId": "674161758"
  }
}