{
  "manageEntity": {
    "action": "Save",
    "entityId": "954476",
    "entityType": "Track",
    "nonce": "0x92e478d8b4cc457d79de98af1ee04e3036c17122fb5d9b5f1bc374a056902b11",
    "signature": "0x16c6eeb7777da12524e7c62738ec8f588c4068fcec2e0d94432242e3104b40087bdbde3ab2d7227a003da9f01f0a4250af6160fa3f146f9594354f8ad80ac6611c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}