{
  "manageEntity": {
    "action": "Save",
    "entityId": "101546",
    "entityType": "Track",
    "nonce": "1785611987715422468",
    "signature": "0x77ca4a31c976e2f5e2453292c63d06f06a73f528a3501c4d4a52e5745edb0faf6946729d939080bcd2e8c7a2ad1fd89868164ce7a72120492d6e0054eb6abcd01b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}