{
  "manageEntity": {
    "action": "Save",
    "entityId": "572308725",
    "entityType": "Track",
    "nonce": "0xc79eb9a143d971d54a05a7f41dd40e4c787e73b322648c4b311fea64734a73c9",
    "signature": "0x5871a18f6e5218bbb97d0d49fe19eaa2dc0726ed49e6a3845eaed34f702e29d66a3a845aba6aa69afc93a6ff9e48c8503ebd87443a23b1c4820438f455c88f4f1b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}