{
  "manageEntity": {
    "action": "Save",
    "entityId": "275366",
    "entityType": "Track",
    "nonce": "0xae0ff61d08cccfd2ef1b7324988fd7b5b883cb7dc11c985f1b2cddb61797ad6f",
    "signature": "0x8f1d3309419b96a84833866cb893bb5cac7f034fddab7dfebcd14ad81861969e49f4b3fc59ff56563c199083f061234601602fff2dd37e7a383b21dbb35b5fba1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}