{
  "manageEntity": {
    "action": "Save",
    "entityId": "25351336",
    "entityType": "Track",
    "nonce": "0x946f8be685aa3f96eab1c19111b96e11b1c683e3ec70494dca47f7679e7920d1",
    "signature": "0x053c152434bd9146768d249dd93329e6f77b7602b3f7bc5b2953703da3783a6422c9d3769599de8ebc7e0edf6def3daf6e4c0b25f1aa987261cd2c8cac06e38b1c",
    "signer": "0xF29B42f036DD7B9c121b212476bBfBb4a993756D",
    "userId": "517446"
  }
}