{
  "manageEntity": {
    "action": "Save",
    "entityId": "1847287116",
    "entityType": "Track",
    "nonce": "0xce303479a18828e22229bdfea9a23bb249cc8c444cfb7c306ff2dc45d8e1897e",
    "signature": "0x1da26b83f0cfb05088fbe1440c6be093b87bb29b99e975d9ac9bd437a6af953e3a9115c42953725411b02ca1eb24160a313e1989e8d31602452dcf71909ec8101c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}