{
  "manageEntity": {
    "action": "Save",
    "entityId": "1461396807",
    "entityType": "Track",
    "nonce": "0x446fd6058a5bf0bbe858c762096d39bbdb148181cdb280b3e6647b488c2a25a6",
    "signature": "0x933fc7192701c6e76993ec4e9ea146461573ad3c0427fbb7eb4d8de80b2f9dd23fb9047f372e40b5aca54c5339111c8522083a55a483db486ab0e46058c47ad11b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}