{
  "manageEntity": {
    "action": "Save",
    "entityId": "2105852401",
    "entityType": "Track",
    "nonce": "0x51f66e27ff8f320a7fb757792d35148557cdb99a09ea24773bfb5ff143b0f3cb",
    "signature": "0xbc11539903b340458490293cb058b09ff1f2878119b252584f0622ec62ce54ec73d42da56c0639ac392ef90a78a11dbd152b2e3a573e73d61080a03a42110bf21b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}