{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x77e97bb73a4b1c708b32111e2f950f5aeeaf89c47c8b7929f41dbe6b33ce3554",
    "signature": "0xfc69aa905c087de4172a79bbe53674586c146e19dbb76efb1753926ab722df5a34a8e8bd2c82a8b1f36fa4042dc9ac636594d74298abcab3e50f62d4a0eb761e1b",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}