{
  "manageEntity": {
    "action": "Save",
    "entityId": "227419870",
    "entityType": "Track",
    "nonce": "0x382609942b53dc3e75071585362eda90a16930b13ef55e36fb8ee473885bcc0d",
    "signature": "0x47ec81597d5014112b7e8cea172f62b92b1f2f51992d20a5d51091159fb38569203328965c597d4b8658cef60612089972ab01b147cc9418b6d12bd02f5fd0921c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}