{
  "manageEntity": {
    "action": "Save",
    "entityId": "174772949",
    "entityType": "Track",
    "nonce": "0xfa753adafaaee38c5734abb6871cb5fffe9955bf6fa74e84f1966093e7b2ce80",
    "signature": "0x5b2efd721b65ac55810382cb98ceafe0e54c96990076c8c62bcced49d94d7774652249784e121a9fea5a519ad40b08a02a23383ce4722f808d1d3bf8b7047d0d1c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}