{
  "manageEntity": {
    "action": "Save",
    "entityId": "516083",
    "entityType": "Track",
    "nonce": "0x314e1b1b7798ea59283eab782f0ee62cde6fea2edcb81809384c5dffd619414c",
    "signature": "0xf5c6b0d01f1cd77b2368e0a45cee22c80cd754917abdbfb5155aac6eabf51fd2178e03d04d043c8c9fa3a31fcb9f6c788157701832cd4f15a47a8913d228b8b11b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}