{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa9170161754ed495786624e85c8c7b8c23fd3b2e822cf2f22cbcd1a96a0e8854",
    "signature": "0xf0adad22524d4b754ca2830a1b2c04264584944553082c4530eb0d416817a20907e3dc372b94e8a2e20b5dc76f15a53a2079ca704530ba3c1b9b7e563bb23b021b",
    "signer": "0x454E40E519436f9b161511E2CF1Dda5d7197c8Fb",
    "userId": "745901100"
  }
}