{
  "manageEntity": {
    "action": "Save",
    "entityId": "414408",
    "entityType": "Track",
    "nonce": "0x8984b262b8346789f07248c889dfa966cb9679397b2bf6c631f68c7886488475",
    "signature": "0x0e212e01633e1a595eede5053cad9320c873dba52f4f9d6c895b587a11623e7d5453ceb6ad6768f688a55123677b1337db5e9b638c8771dfc2f4db0efe7bf6b21b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}