{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc8c3bd44c265cea553c1c6f775970222c2d50f845694e5d1ab03de0687dfde58",
    "signature": "0xb70e8c617038f4c9b00f63f70d977ed8605fcd60ca0a0d7c42641f12180752b36252dcebe6f128e9d5e4082b688f0f6b70ef3b69bc1db01616c44fc24d9110cc1c",
    "signer": "0x50F248CE64D5874ECaE2d899ceAb9144B25E4F34",
    "userId": "978371404"
  }
}