{
  "manageEntity": {
    "action": "Save",
    "entityId": "2140943140",
    "entityType": "Track",
    "nonce": "0x577fff3c188dc91c4620ca1933151f2ee5ef0642327867c861967513edea900d",
    "signature": "0x18c366d67cb13d337bfe1240c897fede44d9fee19575d141d7b0a348ba582d166573d053e774bfe7c2ccc5427e4ffdcde36177a4d4680565bc59d9fec53981831c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}