{
  "manageEntity": {
    "action": "Save",
    "entityId": "985056189",
    "entityType": "Track",
    "nonce": "0x6c7876329b9c1a5b07abf562d628d4300628eae0f7e301b32f8533661aa7ca12",
    "signature": "0x34fb9c820b9fbf48c8a0a91d7e5bca036075d0d6803a3c5e402a192bb7d9130048f1328221e5139893731b314dd57f1ed46ae48b53c624bf6b0b384d07d4c0d71c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}