{
  "manageEntity": {
    "action": "Save",
    "entityId": "41852",
    "entityType": "Track",
    "nonce": "0x621f5b77985a6012c989b3422b68fe1525788efa7dd4f615aeea1051fa9d346a",
    "signature": "0x8c22ebe48b4a001f7187a2a64a5ad2cfabb988d6f374033f37e4416e808c0b502431c43a4d340440f7636ebfbdaf8f2b269e706cac671f07f2864d79c8c473581b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}