{
  "manageEntity": {
    "action": "Save",
    "entityId": "1086531987",
    "entityType": "Track",
    "nonce": "0x75436c81f88ee6c21b882715a22cdb5f3fc42fbccb3d97573193f3aa0d494071",
    "signature": "0xe6668d15eb03e7f2e874647a7b66ec1df2391dab3cc5c670e860f6a996a86bb0165ce80db6f0322f552ff0f0ee26a71ec944971123ee1413dc7197771ae9f1261b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}