{
  "manageEntity": {
    "action": "Save",
    "entityId": "2076978807",
    "entityType": "Track",
    "nonce": "0xd9a0fd093d734db70a00cf789d9e093cdd070661e75504d57e50fd063dfbde4c",
    "signature": "0x15bc3b5a62339e2555e82dd2a673c8534234a3f52e36637b4ffa8dcf12610d0161a91839c010ac099704c83d5b81610fb5a763a89bd94ba1410144126358cc9b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}