{
  "manageEntity": {
    "action": "Save",
    "entityId": "676921124",
    "entityType": "Track",
    "nonce": "0x130643c79cefe97315f5b46ae9a68cfa953db74307da652cd28d31b15d07478f",
    "signature": "0x70dfc98318e098964495387c11ad195331c34f6cc342d8579450aaa0be0015d5369de54292dde592ca861d7fff2fbb97f3efba21c486c1a0f3c5f9c8008cbb6c1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}