{
  "manageEntity": {
    "action": "Save",
    "entityId": "548569614",
    "entityType": "Track",
    "nonce": "0xb265287f7ac1aeece10db72ea4e9341cf8d176fc35645fc23142cd52c05f78e5",
    "signature": "0xc81c6a9111e1bef8cd36991c14ea5c2ec24eee6837331dc39f3c51dc60050eb156db0152d39cff9a1df331155b9a2958c07d6d08d0a4e3d5c7cc6e869c514a901b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}