{
  "manageEntity": {
    "action": "Save",
    "entityId": "579057932",
    "entityType": "Track",
    "nonce": "0x931861d6c14bbe92ad1e5ee167f9a5bc253b681a847140af6ef74ca00fabd6bd",
    "signature": "0xb4ef322e995110d50958754decc2fa59385ecf36e4381c5f44f78f3178dd34c770286893590eeb1c4d3f549484004cc1b363402da38262230ade478571ba7b381b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}