{
  "manageEntity": {
    "action": "Save",
    "entityId": "1893986325",
    "entityType": "Track",
    "nonce": "0x7fd0a7237ba14428118c239746a2d1d5774d80a78da03224720199eedb96341b",
    "signature": "0xc376046b48f18f41bd6b663fb8c30d861bf46b7cc6b5295ba13a44ba15e5e3fc20a2026d1000076d7a64b363aef486cf9ce78ac3c492212dac88540db48e97461b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}