{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "557210595",
    "entityType": "User",
    "nonce": "0xc9c8eef7147b2c6f3a4fe40c3b20e273735e07a77177e4073ea94851320e0cf4",
    "signature": "0x60b123162ad1c5e42a7ad5abcb68622cb9591de5c625345dfc5a6c9e00d8c456065a59b1ed84a5d716c51bb70298a8b23955bc56f504a1952be410cde037c32b1c",
    "signer": "0x648641b8343AC9819Ae81C3f57D5364689163C83",
    "userId": "64916143"
  }
}