{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xc224e2ba2403bb74ef3317bda0415988e864603bcc7a353ab8991c46d9d3fe76",
    "signature": "0xea856d916518ee7e79665c235a6aeba61ad7b92b7770b6841af4087e4d45af3c61396d026d740661e69c9440dd6ea15727da89081266b81856c5339429b149571c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}