{
  "manageEntity": {
    "action": "Save",
    "entityId": "2044590040",
    "entityType": "Track",
    "nonce": "0x460dc82c605abe5906d6478ee7520a7459117c41f64abe70d2997725ceaa014e",
    "signature": "0x7af0e3ee47e0d61f4e9efdbdac7a50291975db267f02a7b3a2f29581194f186c236f2063e62971ad846da64a959a7468f503c09e0a766ac34fc11141962b542f1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}