{
  "manageEntity": {
    "action": "Save",
    "entityId": "161740605",
    "entityType": "Track",
    "nonce": "0x4dcc15efbf207a1ae18129f88813c3a6da9bdfae29a474ce39c46251b6b00bf5",
    "signature": "0xd9d09c64b5809bf9a256b71533321cfe72a446cb641cd3d64572b1109d434d2b46244da875439a2ed1d9fecfc3f2aabed9527c577f05346fb954b3cc8b9175881b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}