{
  "manageEntity": {
    "action": "Save",
    "entityId": "707440",
    "entityType": "Track",
    "nonce": "0x5adcb56ff66f75ba6693a6156080dac58afed9416630b3214cb2a16b967668fa",
    "signature": "0x8321cb36520a2a74bd9ecb889b3d69c2fd089e8aae1f6bd3e645a00847e48ef809de9406ebc043792c9cbced5ab1d7944724a8f4a65d783737e69073bd6a89481c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}