{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777217166",
    "entityType": "Track",
    "nonce": "0x992da84990d9050622556f16dc88b121572b637a2c506ffd2fcfb293933afae6",
    "signature": "0xd93c0c8e1e37282f2492d25d3fffc24b987b1d571d4e0a1a3403e2f0ecca71b9288182681f267ad8eca4dd18ce1bb6a5259554800528ceba926bb14bcb67f5b21c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}