{
  "manageEntity": {
    "action": "Save",
    "entityId": "1367961426",
    "entityType": "Track",
    "nonce": "0x4d490751555ac16419311774b9a6fdc3bf16d4fe3e4dbaac81c55a52134d278d",
    "signature": "0x7803582d8ee6d7d2115bf9d355b042d1c63c838b5da7bf6fdee4dd29f69c81a7782e8737ecbdeb5fc8be8dc8ffc2f9eef2823c71daba425dda71a56b8ea1fbc81b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}