{
  "manageEntity": {
    "action": "Save",
    "entityId": "1078211771",
    "entityType": "Track",
    "nonce": "0x0d6331bd98e8a8c7f4e7ef649e9ec58229b8138f4ac55c8efaf378c7e8d39a18",
    "signature": "0x916ee0a182839f1a4960970c2e8941879992723644086e545d7f47e9786c9560362f60f0dc9ce46f24f59188b8b73f2e92fa97b4b2e6d2f0de92c79e873e8c931c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}