{
  "manageEntity": {
    "action": "Save",
    "entityId": "279810758",
    "entityType": "Track",
    "nonce": "0x2abb443d509e95146b5e4d9b9ce3822c4e4adef5d0ae2174bd426ba577d0ce57",
    "signature": "0xa8f5fcba88fee85e0d11aa902015e718afd13f1042732f873dd394921b4aa81b0fa1b237f08b714f45972c67c565f56b309cfbdbe087ea5f43f046a796c9dd871c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}