{
  "manageEntity": {
    "action": "Save",
    "entityId": "1450520390",
    "entityType": "Track",
    "nonce": "0x5075325a28ab865dfe6bd7e869c5e07ebfc1bf3c5c310e346ee2e896573da891",
    "signature": "0x8095f8d1de91693ddaa457ecde61c2b82de65896939211d5e32304980f7cb60d6f864144728d5b74b56b94cf62123f393017d4c856a474a5428a069a76d226cf1c",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}