{
  "manageEntity": {
    "action": "Save",
    "entityId": "214555",
    "entityType": "Track",
    "nonce": "0x60951b8ef84aea90d4e847013ba74eee4f733c4b60081a22b3f35ea5472ab039",
    "signature": "0x95d6a6431ef78ca2d245ee11cb24e4b41d20eb0294b720ddaedabbc9f30db60511745ec976141a92c9ba864f80818e77e2452c5284617009a020cb0c38ddad0f1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}