{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4db403238c6be4dc30bbe476024fc7ff0967cc484f117a84f779ff32a42a7078",
    "signature": "0xf5dda48e69d1de4d0fb57e22dadab074d5f443e33f8ad3f2e11a08858f6a9cc5307ff5983d1de6b437a74e864251ae4aae714e8e54ad20feb58fbe5a7c2a06e51b",
    "signer": "0x0C4a26388b903fD4825bE9029b68B3cbBa31f84F",
    "userId": "399845135"
  }
}