{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "910778788",
    "entityType": "User",
    "nonce": "0x4dc8503f7bb9d4e1d48829d26bc71fcf58b58931eea4ee3407e588392da45e87",
    "signature": "0xf49bb9759f679f87d894146582546ce4973b06141536eb3c32354197c3a8abf95c60e4f24070e6a4753b6eca4ece46a908af6ecca4d749a389039c2c7c30b82a1b",
    "signer": "0x53f39D73a2dd51E9e8A362EF3b1383072E37cf26",
    "userId": "74209883"
  }
}