{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "551997732",
    "entityType": "User",
    "nonce": "0x0cc55936c732c1a4ce9c730e3e31424087c1b76684210ffef75e55b956d3b925",
    "signature": "0x81e0370b1df48b27b025bbbeece8b50cf97562608d774f45e79ef5706f1c11446bfae823e8e20493bb1caf8c6eddca58e989964c39d334e897cc9b2d28bbbbfa1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}