{
  "manageEntity": {
    "action": "Save",
    "entityId": "270249839",
    "entityType": "Track",
    "nonce": "0xe2821d780f1375bd71566e630e1717acf5ca0bb997fdf436ec8720be0ea62c0a",
    "signature": "0x9ff278284344940bad541309413965aee7526b9e2a4671dcb4cc13d056fe9a5c17d1640fc4adcc4702a73421667908a26d3992c983f6c26ae8d0a344c360653b1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}