{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458125936",
    "entityType": "Track",
    "nonce": "0xcc3303bbdb5370923adeeff07cd6bd8d1811b9f53c0e1667612a1ff95f3ffe6c",
    "signature": "0x7f7738d3bd95b3c453f40638ccc3ea9cb7803c6fbd9c3b1228ce3d04e87c3dae1ad7a38c578a811798dccdf3328b4843dc808dd4ecaf64101d8d817e243f78641b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}