{
  "manageEntity": {
    "action": "Save",
    "entityId": "1848060856",
    "entityType": "Track",
    "nonce": "0xfdacb02150f32d2924e8d573fb071663aa4fde72c94d686f7b46453e7f3e6d0e",
    "signature": "0x65c556dfda9543e3915747e6de8e5789724afaa84af7fb2c6a71a20650bcf262343f8365458e1448274594f44aea7bd022a248b424338ec894bd082da6b670961c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}