{
  "manageEntity": {
    "action": "Save",
    "entityId": "724253343",
    "entityType": "Track",
    "nonce": "0xaf7c105aea13a5f376f957e118e7b641638623478ba815afdee272531bc84452",
    "signature": "0xecd86aab3ac578570e03a54bc1ebd2724577c090d47ab25dc9dfc8238cb8aff41d468e55cacf2dc26443a75623fa3212fb5f5eed7f9616fa59ebe480f48fdb731c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}