{
  "manageEntity": {
    "action": "Save",
    "entityId": "1335493045",
    "entityType": "Track",
    "nonce": "0x599192b3ef657da0eb05d39b50737f4181f7e2d40ce3b2cd8ebac22b6771bd01",
    "signature": "0x74724aaa5ecb52c99a8fe53189eb9faaf531f8be8a9b350ebd9d7f4db0811a2842d9c12b82bf3b944ff18ce5d598a13efeffb6d12778d66f2e2f683530f2981b1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}