{
  "manageEntity": {
    "action": "Save",
    "entityId": "273874",
    "entityType": "Track",
    "nonce": "0x09ea3aee76650f28ab3c423a3d5486507228ddf7e75e299a0d112d84378e0c66",
    "signature": "0x9a76a3a6ea3cac7b7b304730f03278848a482dd357e07351113189d75d76788e0e1997097db12fdbbf7552d813d5ee1748c5cf5f68982b86e307718513db01611c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}