{
  "manageEntity": {
    "action": "Save",
    "entityId": "1379881309",
    "entityType": "Track",
    "nonce": "0xbe8a2c5cb511ca9b4e8beb5bf4f1ca2261186d54d1bd484d4af40253bf4532fa",
    "signature": "0x7417f7742828950c6a9ac35797b268ef2ac9e03a74fd9f4d687fa7e8c991c3945da456137d4285ec6514440c43c3b9e9c376d0c48a91460255bfab0630c648401b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}