{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012812",
    "entityType": "Track",
    "nonce": "0x6a325390b9a94aa3d826bd336b68c014b2183d4e8dc93777aa22e630e97c395c",
    "signature": "0x386d07ddfcd76dee15fd81b26c1c7a0c248cd3d5af31a4ca43c0de694cbcb6a54d6777123b23589342b7e0ad667f4b080bc382243e46c03ec3c41003aa2460691b",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}