{
  "manageEntity": {
    "action": "Save",
    "entityId": "1065932555",
    "entityType": "Track",
    "nonce": "0x44ad26385d7fe5c3efc7e329659c63c57a7c0f78f6d808e75af05151fe3dc4d3",
    "signature": "0x3251a7f8e1357f2efc7f2f3089e78c33a92f5d7fa70f3f6919998df329f6a3406f9707d681924936c11b463aba875263c378bf67fb8205ee8521c6e5c3203b191c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}