{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x3cff61f486a4358561dccb954f4f01dcd21de499ae699bf814d5ae1785a262e5",
    "signature": "0xa7276e6eb527e4335e7b0d6d4e44e3cd8d020d832d4f1dc9252310d587a101c40972121ee968a6b3e109bf542612650a2681c4b410a496172a02fc9751fdf2741b",
    "signer": "0xa603e9487Ed7C3C62E8acb85f8f32acFf5d6349b",
    "userId": "278135553"
  }
}