{
  "manageEntity": {
    "action": "Save",
    "entityId": "963581184",
    "entityType": "Track",
    "nonce": "0x024e446daa8582eded92b3afe26a593c536c3f808c4e98be2ad0a4f7b867bb9a",
    "signature": "0x1e10d2f4ce6f09996bc5f3fbaf168826eb3ae10b8db5a12d70d4b5422417ea830970e96b32175f25626fb0d2ac1456d8ef5e47e7f2fc1e5d8ee9d8cd0f29bbce1c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}