{
  "manageEntity": {
    "action": "Save",
    "entityId": "1966858287",
    "entityType": "Track",
    "nonce": "0x9b57808c6bb612394a1270f96e94cf5e6d7ec384dea0e72a8d1dc2413f74e943",
    "signature": "0xea213a8e68d2c2840b541b9145c3e27b62e09e34578eb7c83a733b8794a151912f0f519bf14ddd538fb481b3bc2ac7194028bf5d2aea1bab62784b14ed595f1e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}