{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "737872723",
    "entityType": "User",
    "nonce": "0x5874a4522926fffa37c78db8829a94093f35e1ceee350fa09489ec099fa5c5d1",
    "signature": "0x9a2ccead969244175cf4ac4f723bdd4fa8b3ca9b1685d71b91cee6e09442085b3bd55fa10f15ed3f5ae7c76c70aab67b058467cac6516757abddd5071b89039b1c",
    "signer": "0xA2431a8293fD33C6289244D08A91489fF2C9f18A",
    "userId": "325308787"
  }
}