{
  "manageEntity": {
    "action": "Save",
    "entityId": "624536007",
    "entityType": "Track",
    "nonce": "0xe2a30723e2fcc21471e9d130aa10509ba36b27f943dee591aa8e22ebd224032d",
    "signature": "0x4d23eb340c3ed7af0cdf589513e3d5bba93a609871f4e659296dc4a8770e513c4f7abc3278afe7fa4b55512440e1533b1b37a98200b735d0fb08dd7bcaa667071b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}