{
  "manageEntity": {
    "action": "Save",
    "entityId": "716772779",
    "entityType": "Track",
    "nonce": "0x82e210a552095bf35c0995954bdfd7edbaf49c7fdddc53f63620c27c954e32ba",
    "signature": "0x6346a07284611d40597fde82f368629e01c86736f5def7b2859ddfbaf03c4f0d61050799b188fb22bd00bb35ec92e286dd8f7b2182e96be911e5ce52a33a49231b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}