{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x290cb22fe04d9d27463aacc0e7ddba01b2d1117e1e56497a0e9944ab8e12f899",
    "signature": "0x4114a786407f1b9f3f21502972bc91c163afb75c1c0e853ecbe9fe786e8bee9e36f811feffa5ab6711411b2264ddd76c33c0ef1a3e45bec0e1363fcf74f5bf531c",
    "signer": "0x4C052e8c3ED797880d3Ca030B888b01f8ba28520",
    "userId": "939204407"
  }
}