{
  "manageEntity": {
    "action": "Save",
    "entityId": "247882355",
    "entityType": "Track",
    "nonce": "0x874537dfa3ab83ebdadad4830c656e83d3c462ad63202af91dd1133f41df6675",
    "signature": "0x2e9520301e88faf4e5e856c386170519db32f03043d905cb98d7b12adb5eb04968f980c2a08ca281b27e2efadc0486236406b99c15a917a4781bcacac0623de61c",
    "signer": "0x7ceA71B4A8C4013A4f57c1A57eC0430915572e86",
    "userId": "31724295"
  }
}