{
  "manageEntity": {
    "action": "Save",
    "entityId": "1348136656",
    "entityType": "Track",
    "nonce": "0x3effd1dbb443bef585369e3d1d5a13aad97b408cfa1fb69233815cabc97967e6",
    "signature": "0xf49a5d8081e696a5b3c6310725ca07a84bd10d2c8a71435429d0593d147f0fdd2a768d347f8cfb75d548850cbfe593c392ad1c85c8785dea86229c156ed57fa11c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}