{
  "manageEntity": {
    "action": "Save",
    "entityId": "189204139",
    "entityType": "Track",
    "nonce": "1786219065904282723",
    "signature": "0xa2d4545f701d9383e625311ff9b87bed23cb6fd0b53c169bba52fb369b55f32974d3e0e38d99f055b1290a4e2e1f689c8b90fdca00100a154e00a936dc0bdeef1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}