{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "839400815",
    "entityType": "User",
    "nonce": "0x7567c0e6e9c9deb54317d2c64386c047bb12025f9ce16980782c70c4a38bf3d9",
    "signature": "0x09f983b65837d2d584954a0e0f3c35456fcbe95fdf16cab3560ed87390d905601a02aa30c77dd4659e6d26c27caa7b86bd07cf88b8cfaf543c04850acc3a32261c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}