{
  "manageEntity": {
    "action": "Save",
    "entityId": "2066076308",
    "entityType": "Track",
    "nonce": "1792361084178589565",
    "signature": "0x460e923a881f693c5e7478df0bd3d0661b864e72832bead9fadde704b28abb602d16d740b1d2e02cda87dbfbcf24749b769dca47a6e8cfb6901980d54ff6fffb1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}