{
  "manageEntity": {
    "action": "Save",
    "entityId": "683700179",
    "entityType": "Track",
    "nonce": "0xaa9df022348b655465bbb0b26c2eb0e797f90e07bbaef3d88549056da4b55cc7",
    "signature": "0x69d5d7380c0d3ee87c7f8e1ca0305ab387a4b99290fffda93a9dd4786e47505263e33e02b1a1eaca9b23bdd173c7415a450d1b668758ab3502be837addc7fdb51c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}