{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1438540",
    "entityType": "User",
    "nonce": "0x4c6c708da51ffca3a312d430e1960161b8e8a5a51983dd0c0734a5f7b648dabf",
    "signature": "0xf51bbe5e16776392a25e4956db736ca6c1b21cb1dedcabd2a3b464484ed6d3ca4d813bcfed4e1acc54a39ee90f654e97ebedfd30b97362d3d1226bad2f08d2341b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}