{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "14521",
    "entityType": "User",
    "nonce": "0x6e76e5b9beee2b6a59a434e9dd2b8ca19f2e5a4d7cee724187e17c3a994fd3d7",
    "signature": "0x6db65ec3d791f8d8f0c962ed799b92bfdca64f7f2c200fd3d7128095a75e9cea7a68f0be32c0b19bfe4a3219b9264c9254647892114a04150e2a54b8169e21da1b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}