{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1e21ad6edd973b99419a295807d1018cc74ce826f02dd416ff38bd39eb2d4d60",
    "signature": "0x1446361acff5ddbcabfd584d4df0bac03f874b3895cc777b36736bc018bb112a1f676d3157ef9010e8fc2fba2ef8fca24447b9a7e2884c27e2699f8a694116901c",
    "signer": "0xccd1a8cE15F6B7aeA0D18DC514047d362d3c4677",
    "userId": "471791909"
  }
}