{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648065847",
    "entityType": "User",
    "nonce": "0x7b3da18881dff593b104aa39cc8fa657f8ee6bde521acfcadc0d50b2f38c805d",
    "signature": "0xcb975f495bc77c556ac67b726d5825cd16492003b9c4b152958663d38d09e8eb5c2df404a999dad6a3cd6d3951a17d716ac2a41dd38fc40cc1d653c1463bdaea1c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}