{
  "manageEntity": {
    "action": "Save",
    "entityId": "2108679337",
    "entityType": "Track",
    "nonce": "0x90875f49a6b1ceb0657f11ad2b06cb686ec6dfc31b8f76e114654b664752b857",
    "signature": "0x2f33475614870913532dd372b3f99d5192bb3afa216c480da5828e93bd8d440b58657da045c6cedea0f6a1df91ef1de2c2d4c18cae656c6cdaa22ef2342c46261c",
    "signer": "0x03e9Caf2aeac5a0F0e4Be56410d67A4148D38Fd4",
    "userId": "47828528"
  }
}