{
  "manageEntity": {
    "action": "Save",
    "entityId": "720741432",
    "entityType": "Track",
    "nonce": "0xbb012c8ca9b89a7d619b6d07ec7c111e19d97679d441a87a6191bed1cf4e2190",
    "signature": "0x1f86397a5221de568f439f3260be45ce1a65c45e0483154258e9af42ccc111f54ace78f191b88c5db39573cae263a56bf49ceaf5117943bc1ebb48679b9b52cc1c",
    "signer": "0x5d8091c5439F52184dFD827f33FF815dCc827bA8",
    "userId": "52403052"
  }
}