{
  "manageEntity": {
    "action": "Save",
    "entityId": "1961349529",
    "entityType": "Track",
    "nonce": "0x16c5ab4a1fa50cf754cebc96d30e8e9a27aea09fdf86ec49da2af936d7c86297",
    "signature": "0x3d083d19ba05d0b28b295df176416931ef82fa19975a5ff6419dae8abb0141f7175bda5256fd69c7edbc3f8e786eeb4a13a14c05d75a05269e006eb0da821dab1b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}