{
  "manageEntity": {
    "action": "Save",
    "entityId": "1768744425",
    "entityType": "Track",
    "nonce": "0xa87c2510ca03c5017d1363fd63c457e54a74fabd6d77bb706b0e7df0b51e65a4",
    "signature": "0xbcca7abb5787847e0d7e637f5b12b3816e5bbb0d0dcef48a061fcc0b849a86c849f41ebc6a97d70a839ca6ded42ef855209b9432c801c843d1490dfd19b17ae11b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}