{
  "manageEntity": {
    "action": "Save",
    "entityId": "4092750",
    "entityType": "Track",
    "nonce": "0x130d9e4a06763011bd5e979d8af791c7d734a9a977ea246d90bc1aea0a07c57b",
    "signature": "0xbeac15ffcd6c98e0a2e77fbc171a50ef7169d1a091e760ad440c8375ce12cc4a3315348c97f6d073d57ec464c61050d9829d988a6f9ca55824617c01b3123def1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}