{
  "manageEntity": {
    "action": "Save",
    "entityId": "443133713",
    "entityType": "Track",
    "nonce": "0x09e6dca9408e5d0955db2224ae7323241e161f669975dc0fcd7015ab2ee888c7",
    "signature": "0xc35529ad6c03ce7d91d594a56923362998439c4b4b333ba5caf67d7f0d472bf312cbff03014d838e20e31b41a1ec0888d908b3211b60a13112806481438a35c51b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}