{
  "manageEntity": {
    "action": "Save",
    "entityId": "1875767099",
    "entityType": "Track",
    "nonce": "0x6f1eb489d31a60d311ccb4094a223c0751ec4d182d9e7825b24a440389ea41e8",
    "signature": "0xb5bef40700df8b1c8549dce0e563474fab127f2f96a03d1707f53816f858fbf461896c273e980f5b7d41bcbed87df86f2159fa94aeee757292a0e81d443d281c1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}