{
  "manageEntity": {
    "action": "Save",
    "entityId": "198205446",
    "entityType": "Track",
    "nonce": "0x8d46e8484eb9318536016dbc64ff04079a15ee665d7f1f6852503287e20bb113",
    "signature": "0xed032e282bd3c77b4cbede677ac7b44aea1c4122d1b1a10f5caf4c6ac987232f401bc62d75be7c47a055a3c09126d1905b2f5a8b9afc4bc3d0bc8a78c27a330f1b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}