{
  "manageEntity": {
    "action": "Save",
    "entityId": "479068059",
    "entityType": "Track",
    "nonce": "1775543080898143833",
    "signature": "0x129686a02bc9c0c32488164a852f1df6e81ca464e51a1c3d5f2f6f5281e726aa6aaee97f040fc7ee6f1b7a73640a2cb0466dda5f852eee29025360a7952e19e21c",
    "signer": "0x43e766989e99A80eCF18BF165011e01fbFC3A676",
    "userId": "106879"
  }
}