{
  "manageEntity": {
    "action": "Save",
    "entityId": "1111456",
    "entityType": "Track",
    "nonce": "0x444e80bcb699b6fcdb9827c2a4c9a2b35e26283bc462b8a9a7f16a4cd1bc1beb",
    "signature": "0x3e52e9f48b598f5cd84068b98fe8c802bd258bc4dfad5bf2183005e886fbb5f3095acb14fe9ea62f05ba40f8300bd85a23ea8a017f852ed496b1d4998313972a1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}