{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18734001",
    "entityType": "User",
    "nonce": "0x3eaece025aac21a5e0148d7e654b03351a55b5dc7a39b2418c44ba13761b60aa",
    "signature": "0x831f1e978f74ea02e0b92c02459d9a213e1006f33d492d7741a1432b782c1f864c8c6da8bc9a5bba32841d7e64028b1d695b236352f048fc6a9bcc86c034b6671b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}