{
  "manageEntity": {
    "action": "Save",
    "entityId": "613231165",
    "entityType": "Track",
    "nonce": "0x9f25db3725886a864762d3c87f1d3149c4fa4819bd21debee578b9c17e999e2d",
    "signature": "0x91358e17a7c728550a5c1de9160eb2f4c86b0d1883dcc1827d219c6b71527ebd26c6208a12ab6ab7e82c5b1d719adff9ea44e8e718b7e65a20f078d9f4cd74f01c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}