{
  "manageEntity": {
    "action": "Save",
    "entityId": "1256371238",
    "entityType": "Track",
    "nonce": "0x1fe1f4247b51ba0b959ffbcacb845a22119a92cc9e8c872f7bdba534c85fb3a1",
    "signature": "0x6d292406b8dbf23a9df124990ecfb1b429d3e4288ea1654d6172c81750e7f1b2314b6bc29380d64d2f8acb11ed22311035f5ba01580ab72cc31d695fe649b2571c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}