{
  "manageEntity": {
    "action": "Save",
    "entityId": "1948309004",
    "entityType": "Track",
    "nonce": "1791745327614124622",
    "signature": "0x36c98ee2d82cf67cf6373421ba885a7ec324c0985a50c7e471824c81150bc0b55c9e263c4af8e4beb5293bca1cac106bc667b19db70539ff03c3cbb15094c8861c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}