{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "740731",
    "entityType": "User",
    "nonce": "0x74457ec79333fafde00920d2d37554a675e4ff16b3d3712987dbd6e8b34a67f3",
    "signature": "0x4b0849290116414852690686babf85e6eddfc649bbcb7e8f10cd7a12be50ee344a03037fc253a354d15599115b2cbf400acb5c8f9a651d7c5c0b58f6f8ffc2571b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}