{
  "manageEntity": {
    "action": "Save",
    "entityId": "1994899359",
    "entityType": "Track",
    "nonce": "0xe6bcd07dfa4b8f0abae9c77e998948404c1a1087c4cdd6eb56f8cf1da66529d2",
    "signature": "0x7cb17f9f7f2138a3ca2adb43c18fd895d1f59b00a03e568d1cd2b891563c492e585771c9f25eb1b51b339ee1b185d6903db00456272c89d76a64fe73f8da754a1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}