{
  "manageEntity": {
    "action": "Save",
    "entityId": "911889005",
    "entityType": "Track",
    "nonce": "0xb2475d0d3e49d6330cb0ca79ace04362571fc60ee0951bf04758308402042573",
    "signature": "0xfed1ca52683ac3174e3f673a6def734694c5a0970a68bcbc3aebec781006e3d71302d1c6084d0216f9fa20e95b7734873ef9246292caf9b9b65fa5033cd1d9b51c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}