{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xd72b7fc916b135bcbce01d77f01473f5305dc9a30942c3914a38e74b6f9bd1b0",
    "signature": "0xc8bef16f70057170a839039fd865d4fef64e41f9fa29e1c20381cb4f95404a0468a8d26fdbd4ae69f9d2f855471704c6942cf2330536c73cb1046acbb70996ce1c",
    "signer": "0xd4172DACb313eb72C6Ee29bc685450908f4A1926",
    "userId": "407046354"
  }
}