{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "900066767",
    "entityType": "User",
    "nonce": "0x0a74eb54f3a0391a4458db8a5f5e2e93c3280a203ea7c4b0a2a7132950eb3357",
    "signature": "0x50a09e6353e80dd0efd8d11111bfd3da0532568468461c08275b91066e38ff91444581d063888633d113b80b9190bd45cda32ff3271d67b8afa9437a638165e21c",
    "signer": "0x90d627796C9E2071AAd9F8C20f6dCE95587F6d13",
    "userId": "560619378"
  }
}