{
  "manageEntity": {
    "action": "Save",
    "entityId": "87027",
    "entityType": "Track",
    "nonce": "0x37d3c2914c35bbd05c061d527400acf1e1930fda91988d006febb02a6d978d5e",
    "signature": "0xf3de5551dabd574e6fd15db87f34cf872b763d4a28abd6f0c4cd0b7d3805f28363844fab07e27068db5927ee65af7cc7c11b1fba4cf14fd23a4ee5d1c13883a81b",
    "signer": "0x4D11c3319e766BE8ad4bD57B7E1C96300e25bcd3",
    "userId": "261446337"
  }
}