{
  "manageEntity": {
    "action": "Save",
    "entityId": "75980352",
    "entityType": "Track",
    "nonce": "0x6b222abc7e5a464fa8c4a98e5c87143612648370dd5c76306b1193b7875661de",
    "signature": "0x399b14a698362e3948918a73cd170501b1b9101e969ab63d468bc49500003a822f319f9ddaa7517a657b140b71d2bee4b4ff44dfb88db48b2e53446eb5f841291b",
    "signer": "0xbd08d39c7eF0c2f1aF7E4989fF8e283b743B32ab",
    "userId": "333508153"
  }
}