{
  "manageEntity": {
    "action": "Save",
    "entityId": "59603666",
    "entityType": "Track",
    "nonce": "0x8f0d92640e3cd0e5f139a623dfe081b18cc6cdc4af1be3785e8d5a0b0195a1ae",
    "signature": "0xd9dc4a2d9c62d57515879ab1a5dd1c74ab47ae8275a06133b40c1e53f61abea174641c7e55c9fb4eba2c38269c84df6c05fa1eefab7c2f577bca5eb626bc0a251c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}