{
  "manageEntity": {
    "action": "Save",
    "entityId": "997538",
    "entityType": "Track",
    "nonce": "0x6e56c55480ceec3b863b4e6ea1605e461faed6e08acac62f0c3a7a24da29a5a6",
    "signature": "0x4e51f7157eec9c68c41663727b68b1abfb6495734cc6395481fae58d7f5b6bec0d5089d0f7c7d7774572d14167749fe0f730acb7dfc468e7d658b955c9e12d4c1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}