{
  "manageEntity": {
    "action": "Save",
    "entityId": "587514856",
    "entityType": "Track",
    "nonce": "0xd1c348ac6784c227da646408a69822c6475e54cd2db77abe8415eac8820f1060",
    "signature": "0x77979f9e258d2e6d37750f81e046af41691d7e2216b1c18f52f613a689f7bc861f7a475be63f347ca4f2cb72ab31316ce497f47e76c52f7902194ad80ac22bcd1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}