{
  "manageEntity": {
    "action": "Save",
    "entityId": "308906862",
    "entityType": "Track",
    "nonce": "0x5ba9de8d2cafe6490406d881ab1ec7f7839a75763889b84cd34ce1a4dd18c3ba",
    "signature": "0x588f826df06f3a4ed84ff268d22f1fb2b26b9ab6cda11809541fa95cbc29d563508b544f99d27396a4ae606a01c276521449c832271b832a89aee75ed476c2411b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}