{
  "manageEntity": {
    "action": "Save",
    "entityId": "1171970489",
    "entityType": "Track",
    "nonce": "0x0f1b9db4d93e444e17cc8819c83716380715a6caa487d1126143d756424ebea3",
    "signature": "0xebe1f1ffbfe715d9f7df63af3cc0db855d7e925e104d9de11c22f20e856089f775ad9b65ad8c074458b1e0230db994cb8553c23758c46ea6861d46958199a6e41b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}