{
  "manageEntity": {
    "action": "Save",
    "entityId": "1742292605",
    "entityType": "Track",
    "nonce": "0xe540726b315146cbca7412a4d2d00e4b2a4a5316a9a4bbadb56b58cee1a4bed2",
    "signature": "0xfd2d10ac420d4b772297d59c987315414b8a386b1c1afbc8c67a50d4d0bbfae036040ec192980ad180f8c036f430e272ce60220c7f3be65d65d6a27361cd4d471c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}