{
  "manageEntity": {
    "action": "Save",
    "entityId": "568685535",
    "entityType": "Track",
    "nonce": "1789538732653041357",
    "signature": "0x5a7dc24b52a2095ab9bd4ee960bfa72a16b00f6b6837ccece6e1afdb475248302097563bb53834172178e4bb05401c20ef2820ef5e2df0fc5b953f3c305b7cf11b",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}