{
  "manageEntity": {
    "action": "Save",
    "entityId": "1922468847",
    "entityType": "Track",
    "nonce": "0x819fc88e5f9c5fab438c738ef4d1b0c68c8b7f0de447a833ad773bb8fa9f2756",
    "signature": "0xc23276bb49e5534657e27f5678b457839066928ba5ce4c3bf883c0dd6ad8084c0fbbf40a0e5fe68201c7655fd315c63dba32d7ef44d3f735b3fac01e10db89b81b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}