{
  "manageEntity": {
    "action": "Save",
    "entityId": "846808177",
    "entityType": "Track",
    "nonce": "0xa87c81541bc123ea40ab0fbc3af328f0779b65d421b013f4f5501621d78dabd7",
    "signature": "0x37f146f13286246c4b59f1e3cb63dd3e122505b8d3f5598c47b116313fdd0fd47b1825d4dd4f8627b83307f20a5f04e11cece02e5fd63da234d94f4dcc68fb5d1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}