{
  "manageEntity": {
    "action": "Save",
    "entityId": "1508388206",
    "entityType": "Track",
    "nonce": "0xa593911504ea3311dd09732d867ae3f43d66456045ded144adc9d733a63243d2",
    "signature": "0x9074cf7e7e4e61be841dcfddb498c46d81ce0b1fd3d9d46547cc1c94f6423b296684ffd084c4b9dffcbe9effd52d4c221e642bd7638ab2ccc55019296ad7b48b1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}