{
  "manageEntity": {
    "action": "Save",
    "entityId": "333682200",
    "entityType": "Track",
    "nonce": "0x6f68639ef6c97f6abfeda959ab82bfb05cdd5219e3ceb14e98c35303368f7274",
    "signature": "0x213a232e1a092afe443fcf678073106b5014783817e82b708786497b2bf5b51d3f95c8bfd8a927a322f3d1a0f4575348b6e9d6340960a5187a53d7e58fa079081b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}