{
  "manageEntity": {
    "action": "Save",
    "entityId": "556404932",
    "entityType": "Track",
    "nonce": "0x76514da43bd51c3d87eae3b0032d0ace5187ba7cf6a0f688fdb764cd3d19c3ab",
    "signature": "0xdc51288a833fba6055737624107e649deef43ecbe189c759a7935a51cdabb8c87f261cc68ae357850ccbdfdc15666501c547957dab0b2afc47a7d1239fa2dfeb1b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}