{
  "manageEntity": {
    "action": "Save",
    "entityId": "1480513746",
    "entityType": "Track",
    "nonce": "0xfdf98de3ac7bea5eba45b7175659c58e5f882f88af31e7c2b6571bb5b6e6e084",
    "signature": "0x67b4e16dd680c6b50142a3abe43c4d9d0c88a6444bdd0e4392ee5d9946771ca33f5a3cef3df0f993f9ef2fe23949c6943fdb932fcbafbdc7814308905d41d7731c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}