{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1722125",
    "entityType": "User",
    "nonce": "0x9a8252f296a1be514d22675a434ffcc3bc5cd7da73a75d7d77612a306fbbfd44",
    "signature": "0x24e18a35b2b20f4bceddc93cd471695d837011004dc8dd05aea3022aed2372db63cf2dfa8949ae1e1c56f5f67fdac9313d1b80e7d0a33235b847ee8ee8c5f1ed1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}