{
  "manageEntity": {
    "action": "Save",
    "entityId": "1801058609",
    "entityType": "Track",
    "nonce": "0xcc5c5b2f3174042ae6b87969f59b4ffef713f3128b4ac775441b1797c2614b14",
    "signature": "0x4023520b8f18fc0dca993cbaddf90a24bff0141471af621bcfb00efe3fef1ff0575f9a3b985c8f145ad8bac10bd7c45f79e3854ff701551e5b1efb1c3769b2bc1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}