{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620739",
    "entityType": "User",
    "nonce": "0xa3cbd5637e1778c0469ca3349b5457aa9fca69938c8299d03cb649e7fad698b8",
    "signature": "0x64b33e648b8a75cb755a3c4d3b20a058ddbf48f820f610e9f7f5e2b2e4847e110a6dfcdd7e204a5a5860b3b3b24f1430ff06359bb65fcd132ae6e3c4568750181b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}