{
  "manageEntity": {
    "action": "Save",
    "entityId": "73922888",
    "entityType": "Track",
    "nonce": "0xa290a24f41668a643907da01ccf27b05d39b2eae20d45da9a3272147aeff99b8",
    "signature": "0x11c846ee38ba5d18f77ba214a3946582e1e57f3a9b2e3bf168346a1a3f31def20d2ae35f500b2b81efc43faeaa673b03e5bd3d7f4258743bdb27cbe421b5a3111b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}