{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "640738",
    "entityType": "User",
    "nonce": "0xbea4f73a0cde56d28cfaa84f5edcc6089d536ca646bbaf04757ddd94382f6786",
    "signature": "0xd737495d443e2c6e05b32192f5d146ccb1d0b2a0e0b9ae81506d2552073782754e57861063294077fe7021151d987368dcd081cf3783313ce668c11d69cfcf351b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}