{
  "manageEntity": {
    "action": "Save",
    "entityId": "368482",
    "entityType": "Track",
    "nonce": "0xe83866798669d05630ef283ec534ce3d53d4729e88ad4aba298166ff6b47c77f",
    "signature": "0x5e063915fc03d1c7136a7b91be20e2bc91a7e3d977d14cf93ef8d2b4cfc64db61bfd196cda36f639d8a4d0c84f0584003c336cfdb4d40cb8d8a8912ac519ed031c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}