{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1881300",
    "entityType": "User",
    "nonce": "0x7f4b25cba58a11ff50d8866826918443725f23ea5928af4c88549aab3dfe8d29",
    "signature": "0x6d26c5b8af22c2b05bc71062917f667cbde7624a5d93d8a34f15a66b7241d9bc6a2056be28d398f309814b34801ef89c5e1f4efdc0e93fe7c7fffb903eaf244e1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}