{
  "manageEntity": {
    "action": "Save",
    "entityId": "1843067277",
    "entityType": "Track",
    "nonce": "0x2e47464c6d53390eec2fda0b2251fe859606be5ee574d1da47b43837cc6d98f4",
    "signature": "0x4fbada6cbfb56006446379b887f940ea4f09ce7f9cf69ca970e2813e1f35bd7102d37abc3c4b2f0147db9917f2bfb759356a1d02d27aaeeba9773b73e7c934341c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}