{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "624459316",
    "entityType": "User",
    "nonce": "0x3ec8a64bd308c8f5fcc35172f92842461494b244c9d450293f0c5f358e989262",
    "signature": "0x8520b7e0937cc063cccab60f15b830a985c6c4e24ab6db38c04f5a4c4a4f068a4ed3764ca48a5fd5bc6a315e5825d983e0d3d9788180c06f839410eb06e108f71b",
    "signer": "0x8338E7c24ec3d51E4756DbeD130274d5d6D4442D",
    "userId": "237935"
  }
}