{
  "manageEntity": {
    "action": "Save",
    "entityId": "1906823505",
    "entityType": "Track",
    "nonce": "0x574ee6253269dcfd8b328dd8053505ab20b3b4e29500cab823632ea6430aed31",
    "signature": "0xc8f042e76acb0950956691b4e0785270dcbbe7821deb9583239d4111a3f85fd538efc9d8036e7d5daa7f10d2a67bc2060f97a3abdd712f45842d3ad31a766c991c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}