{
  "manageEntity": {
    "action": "Save",
    "entityId": "397090722",
    "entityType": "Track",
    "nonce": "0x1e05ee5d72275d9f8c47ee441a53bc5ceb29748cb388d7082940baf95943b5d9",
    "signature": "0xcb2575918c64d2174fda0eaea915ebc5e6d5dfaca9725884d23b36d7f3eadafb3a8970fe4c33307591998458e821deaf60a657607595bfc4fc15e914a3fc53711b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}