{
  "manageEntity": {
    "action": "Save",
    "entityId": "1042879",
    "entityType": "Track",
    "nonce": "0xd16d1639ce82b5a8583463d9979d810e9621fa14369a6c15df22d21d3981056c",
    "signature": "0x5f56fdf0ebc2fbe95e057ebb5a132316ddac87c12bac1ccaa816bc03ca981d8a18b314afdca80170a13c63bd69403ac2345860a7e11855f02930358967ab28861b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}