{
  "manageEntity": {
    "action": "Save",
    "entityId": "2007278465",
    "entityType": "Track",
    "nonce": "1787925614320172090",
    "signature": "0x4f7d3c9e5e65485e8b8ee8fb0edc97e98387e8cffafe67dfeea210a06dd1463907c338248eba43c08e36a8b327b524252e5a97c3ff0284e6c6cae02a188e82041c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}