{
  "manageEntity": {
    "action": "Save",
    "entityId": "874812864",
    "entityType": "Track",
    "nonce": "0x6a710a0b700173fc196c167f055e56050860840b09f51c85adcc95bdef6ce81e",
    "signature": "0x9ef9b3b832f22b3954b475ffa05103fb8e789107668979d113cdab03cde4df6677d4add383792c1a59bb0241f8adbdcf00f345b5f8456354bd0d5f4c19f646c21c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}