{
  "manageEntity": {
    "action": "Save",
    "entityId": "2045660700",
    "entityType": "Track",
    "nonce": "1788187558343694414",
    "signature": "0x97bfaf37e2d3ba6867fbdeb3a455fd9e34425f7dccde5f4d0e8d5d1d668f33643ba90e980dccd417e03e1db2dd20468e946a3c7219b4b146305bc856cbb60d951b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}