{
"manageEntity": {
"action": "Save",
"entityId": "904971754",
"entityType": "Track",
"nonce": "0x918e6b6553c0794cce5b66091de8d96d8deab9021ea0af348840f9a4caa3c630",
"signature": "0xafb8e6015bc7f8f3eeaf2a980cb45efcc558f4a22b4249ed4f475b31335c580f5835fdcbeba58aba0397d8ddaacb686497617949428f629e96000363eb64e2331c",
"signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
"userId": "77551267"
}
}