{
  "manageEntity": {
    "action": "Save",
    "entityId": "193461867",
    "entityType": "Track",
    "nonce": "0x575a52a03872bf356786c46bdc9d837dee76baa48c50f1a16aeb1b2f8e355cb8",
    "signature": "0x2e72178deaa6b82e53db6afc93118f811ebdc99adbb28e663500cc9ad6d0c97609c7cd5094e7dd258aa73ae8914c3e3a4c6cb4d0e88256be2561701a7db6f3db1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}