{
  "manageEntity": {
    "action": "Save",
    "entityId": "746471669",
    "entityType": "Track",
    "nonce": "0x89dc433a01f0c39b179c9f82c8278bd61c74096a01b8dc6bb2e18bd86a5181f4",
    "signature": "0x0034870a8df8fe2b3de20d4d30ac17584f13fc97538d684882d144a98f9dcf807801b3136afc5bf9c469c6bbc7cab724bd513beaca352fdbe2ef807021f02a331b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}