{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18937",
    "entityType": "User",
    "nonce": "0x0f2001e457b83ad5370ff8af889b0c3e4a5820aa5ba0a01fb6384f2c159e3069",
    "signature": "0xe69c78b78fd7de509a5da51331b9b6c1ae63e638ce17501377b32e9171b9f0c63c591a565d674c3d1d581b5b8816753169ee2b437951c94ec0c851c3894095f91c",
    "signer": "0x1b2b5973B096C8C3E93BfD5F769cf27295463638",
    "userId": "709797587"
  }
}