{
  "manageEntity": {
    "action": "Save",
    "entityId": "940390884",
    "entityType": "Track",
    "nonce": "0x94e02fd202ee69c8865e805241c9ff68ce282d22ec44c6c4276a85c35c399fad",
    "signature": "0xb80cf710283bd8725b32e1314286573d8022d72356276d3f7ff3b3ddc5b604af34a76b59b9433ab7a580704dc9c3b62251fefbd934f3539eba36e1d5afcb652a1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}