{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648120",
    "entityType": "User",
    "nonce": "0xa4f78c87c06d093403f4be42e59544bcdac6691c9b9c2cd999053aa8d0895600",
    "signature": "0x5ce6d2115d63590be89256dde787401400be3dde32d56b3da7db218b093d558b7f133e6a45257835dc9b445af47f69b90a51920f5f37621ef118cdc5fd8a4e591c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}