{
  "manageEntity": {
    "action": "Save",
    "entityId": "316409",
    "entityType": "Track",
    "nonce": "0x7fd7616d39271d12b5bbfaf529399de7b788b3194e31f69ddbeb97b550c0de4e",
    "signature": "0xef65931d672b15e60cb8b0f8525bbadf2baad1f812a854b6cc489f4e396147ef6c0615530a269b6100ca1d7e499feed42b449b13bdd10f9a1fe62945f7db324e1b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}