{
  "manageEntity": {
    "action": "Save",
    "entityId": "1842654085",
    "entityType": "Track",
    "nonce": "0x98289f919c833a53d372595bc3feeec607c04b0f0e07ad5e5e59406ee41b4d9b",
    "signature": "0x8467e3a7a6c6705ffe11ac16df662a579acd881f94e2286fef7c3df37e8d9c127165819b42704507999e7c94d02f7d105428d31343f5d3afbf94f2308a750c311c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}